Dbill



2 Sheets-Sheet 1 Dec. 22, 1925.`

A. E. CARLSON DRILL Filed Dec. 26. 1922 w 0, 75, MM 7F W AW, 3 c 6 7 47 .L dn o0 e 7 ATTORNEY.

2 Sheets-Sheet 2 A. E. CARLSON DRILL i e 98C. 26 1922 VVE TOR I ATTORNEY.

Dec. 22,1925- IJ a 7 Patented Dec. 22, 1925.

UNITED STATESv PATENT OFFICE.

ANTHONY E. CARLSON, F LOS ANGELES, CALIFORNIA.

DBILIJ.

Application inea December ze, 1922.` seriai No. 608,913.

To aZZ whom t may concern.'

Be it known that I, ANTHONY E. CARL- lSON, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Drills, of which the following is a specifica-l rotary cutters fourth, to provide a bearingl for the said cutter-edge support and former.

.Other objects are to provide a rotary cutter that is simple to construct, and easy to operate.

Still further cb'ects are to provide a multiple edge drill t at is easily repaired and sharpened. a

Referring to the drawings:

. Figure 1 illustrates a side view of the drill and stand.

Figure 2 is a sectional view on line 2-2 of Figure 4. l

Figure 3 is a part-sectional view on line 3-3 of Figure 2, and its bore.

, Figure 4 is a part sectional view on line 4 4 of Figure 2, and its bore.

Fi re 5 isa sectional ,view on line 5-5 of Figure 4.

Again referring to the drawings in which like characters of reference desi ate similar parts, the head 2 is shown in rilling ositions in Figures 2, 3 and 4, within the ore 4,l and the shank 1 is formed integral with the said head 2, the said shank 1 is secured to the sleeve 22, and sleeve 22 is in turn secured to the stand pipe 23. respectively.

The sets of bearings 12, rollers 10, and cutters 7 respectively, are assembled in the head 2 at angles to the longitudinal line of the said head 2 and the shank 1, with the outer end of the said'assembly pointin upwardly from the central portion -of the e'ad 2 and the lower end ofthe said assembly'pointin inwardly beyond the outer circular face o the head 2, as shown in Fi re 4.

The several sets of bearings 11, rollers 9,

2andse cutters 8, and segments 21,-respectively, are in turn assembled in the same head 2 at angles to the longitudinal line of the said head 2 and theshank 1, with the upper. end ol the` said assembly pointing inwardly to the central portion of the head 2 and the lower end of the'said assembly pointing outwardly towards the outer portion of the head 2, ass own in Figure 3.

The respective assembled sets of bearings 12, rollers 10, and cutters 7, and the assembled sets of bearings 11, rollers 9, cutters 8` and segments 21 are slidably and operatively arranged in the said head 2 so as to clear one another, and the edges 17 and 16 on the said cutters 7 and 8 respectively are extended into the bottom portion of the bore 4 with multiple-angle radialcutting lines, vas shown in Figures 3 and 4.' The cutters 7 and 8 are assembled with their axes substantially ninety degrees apart and with the outermost cutting edges 16 of vcutters 8 within Vthe circle described by the innermost cutting edges 17 of cutters 7 so that said outermost the surfaces 18 and 20 are formed in the respective cutters 7 and 8 between the edges 17 and 16, the shafts 13 and 14 are secured in the cutters 7 and 8 respectively, the head ents 21 are formed with slots 26 and 27 t erein, and the said slots 26 and 27 operatively receive the said shafts 13 and 14 respectively, in their predetermined anthe rollers 10 and 9 are in turn meshed o eratively into the said cutters 7 and 8 and t e bearings 12 and 111, respectively, on lines to correspond tothe said edges 17 and 16 and the surfaces 18 and 20, respectively. The Said rollers 10 and 9 are formed as hereinbefore described, and as shown in Figures 4 and 3 res ectivelfy, and the ends 24 and 25 respective y are ormed on the outer-central portion of the said rollers 10 and 9 vto fit operatively between the recesses in the said head 2.

p Thehole 3 is formed,through the central portion of the shank 1 and head 2, and the hole 5 passes from the Isaid h ole 3 down to gles 'to the longitudinal line ofthe drill,

the holes 6, the said holes 6 in turn pass, through the lower portion of the head 2 into the respective Iiutes 15, and the flutes 1 5l are formed in the outer portion of the said head 2, from the bottom end to the top end thereof.

To drill holes through stone and other hard materials, the operating means is first made to lower the pipe 23, shank 1 and head 2, into the bore 4, to allow the cutters 7 and 8 to roll around the center of the bottom-end. portion of the Said bore 4, and as the said cutters 7 and 8 revolve with the shafts 13 and 14 respectively, the rollers 9 and 10 are in turn revolved in the bearings 11 and 12..

respectively. As the bearings 11 and 12,- rollers 9 and 10, cutters E and 7 respectively,

wear together after being used for a time,

the shafts 14 and 13 will shift back into the slots 27 and 26 respectively, and allow the said bearings 11 and 12, rollers 9 and 10, cutters 8 and 7 respectively, to roll and bear together as hereinbefore described.

With the rolling motion of the cutters 8 and 7, and their respective edges 16 and 17 and the surfaces .20 and 18 under pressure, in mesh with corresponding adjacent surfaces on the said rollers 9 and 10 respectively, the said rollers 9 and 10 will keep the edges 16 and 17 respectively, in a sharpened condition, and the surfaces 20 and 18 in turn deliver the load from. the rollers 9.

and 10, to the edges 16and'18 respectively, when drilling holes under pressure.

The inclined position of the cutters 7 when disposelfrom a raisedoutside position, toH a lowerinside position, permits the outside Aedge 17 thereo to extend beyond the outer surface of the head 2, to drill the bore 4 to a larger diameter than the said head 2, and also to assist the drilling operation through the face of thebottom-end of the bore 4, by cutting on a line made by the inclinedposition of the cutters7. The inclined position of the cutters 8 when disposed from a raised'vcenter-point in the head 2, to a lower outer position, to a point joining the said line of the cutters 7 permits the outside edge 16 'thereof to roll formed by the,said inside alternate order.` .v

llili The materials are broken" and cut fro the bore 4 as hereinbefore described, and are removed therefrom in the customary manner2 by forcing water down through the holes 3 and 5, and thence lthrough the several holes 6, pastI the flutes 15 to the bottom-end of the said bore 4, and the said materials are and past the shank 23 to the top of t thereof.

I clalm 1s: ,1

1. In adrill,a

wardly from the axis of the head, said cut- .the innermost cutting edges 'of said first adjacent to the drilling line.

edge 17,' in their. lower end 'of saidhead with their axes inl nular cutting edges, 4said-latter cutters beling journaled in the lower part of the head with their axes'inclining" upwardly fromithe j washed up between the head 2 and flutes 15, l

1 the sleeve 22, and pipey t' he 'bore 4 for disposal Y l.the first pair of cutters.

,Y air of cutters formed with, ann

head, a,bairfofrotarycut?"edges,said cutters being journaled in 'the ters journaled in the lower end of said head with their axes inclined upwardly from the longitudinal axis of the head, said cutters being formed with spaced annular cutting edges, and a second pair of rotary cutters journaledin the lower end of said'head at substantially ninety degrees to said first pair of cutters with their axes inclined down'- ters being ting edges.

2. In a drill, a head, a pairvof rotarycutters journaled in the lower end of said head with their axes inclined upwardlyfrom the longitudinal axis of the head, said cutters formed with spaced annular cutybeing formed with spaced annular cutting edges, and a second pair of rotary cutters journaled in the lower end of said head adjacent said first pair of cutters with their axes inclined downwardly from the axis of the head, said cutters being formed with spacedannular cutting edges, the outermostv cutting edges of said last pair of cutters being located within the circle 'described bypair of cutters.

3; In a drill, a head, a rotary cutter 'our' naled in the'lower end of saidhead, a bearing, and a roller mounted with its u per side in a recess in the bearing` and wit its said cutter.

` 4. In a drill, a head, a rotary cutter 'ourl naled in the lower end ofsaid head.. a ing block detachably mounted insaidhead a second pair4 of cutters 'ournaled in thel lower end of said head, a jacent saidY firstv air the outermost edges of said last cutters eing within the circle described. by the. innermost edges of said rst cutters. ,v 6. In a dri1l,'a head, a pair of rotary cutters formeid with annular spaced cutting edges, said'rcutt'ers being journaled in the clined downwardl from the axis of the head and with the inner cutting edges of the -cutters adjacent each' other, at their lower' sides at the axis'of the head, a second pair afl-rotary cutters- `formed with spacedanaxis of the head and with their inner cut- 'edes 'slightly outside the circle de-l scri v dl y the outermost cutting edges of 7. Ina drill, ahead, a p

r. .spaced cutting y i lower side in contact with the upper side of eary and provided with a bearing recess in its los ' lower end of said head .with their axes inclined downwardly from the axis of the head and with the inneracutting edges of the cutters adjacent each other at their lower sides at the. axis of the head, a second pair of rotary cutters formed with spaced. annular cutting edges, said latter cutters being journalcd in the lower part of the head with their axes inclinng upwardly from the axis of the head and with theirinner cutting l0 edges adapted to circumscribe a circle adjacent the outermost, cutting edges of the iilst pair of cutters. e

In `testimony whereof Il afx mysignature.

ANTHONY noARLsoN. 

